Osborn HSS-E Goldex jobber drill bit set ,feature a bright body with a Titanium Nitride coating on the working part of the drill,they have a 118º split point. The self-centring jobber drills are best quality drills with an excellent, long lasting performance on a wide range of materials including steel, cast steel alloyed and non-alloyed, grey cast iron, graphite and malleable cast iron. Specifications • Size Range: 1.0mm - 13.0mm • Increments: 0.5mm • Number of Drills: 25 • Type: HSS-E GOLDEX